How-To: J-Pipe Adjustment and Function - Pontiac G8 Forum: G8 Forums -
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post #1 of 4 (permalink) Old 01-29-2010, 06:12 PM Thread Starter
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How-To: J-Pipe Adjustment and Function

How-To: J-Pipes Adjustment and Purpose

This wonderful sound canceling technology is built into every kit and is the final piece of the puzzle to make the Solo exhaust kits “no drone.” We have found that one length J-pipe works wonderfully on one G8 but needs the length to be slightly altered on the next G8. For this reason we have made our J-pipes adjustable on the top. Just loosen the band clamp, slide the pipe, and re-tighten. We will send every kit at the “factory preset” position, but you will have the ability to adjust as necessary. One inch can make a huge difference in exhaust note and ˝ inches can further tweak the sound. Just like a trombone, the different lengths can actually tune out different frequencies. In testing, one passenger liked the higher pitched octave and I liked the deeper sound. This adjustability will allow the owner to tweak the frequency to whatever his wife truly likes. LOL. One pleasant surprise when testing the J-pipes was that we felt vibrations at certain settings in the seat. By moving the J-pipe to it’s optimal position, the vibration was “tuned” out. The position and shape of the J-pipe has been researched and tested on multiple cars and wow does it ever work nicely. After a long ride (30 minutes mostly on the highway), the exhaust system is scorching hot. The J-pipes are actually cool at the ends. They have been positioned to allow the exhaust gasses to bypass them but let the sound waves in. This keeps them clean on the inside and workable. As soot builds up on the inside of any exhaust pipe, it “absorbs” sound instead of “reflecting” it. Our J-pipes have very little exhaust gases entering them so they will continue to work for a very long time. We have made our J-pipes removable for two reasons. If a drone develops after years and years of driving, the J-Pipes can be removed with 2 band clamps and cleaned. This will restore them to their original working state. They could also be removed and capped off when you want to go racing and enjoy the full raw sound that the car is capable of producing. Of course this would mean a drone/hum on the highway. You could uncap and re-install the J-pipes as soon as the race was finished, and the drone would be non-existent once again.

I hope this is helpful information

Steve, Jeff, and the SOLO Performance Crew
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post #2 of 4 (permalink) Old 09-04-2012, 11:52 AM
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Now, here's a question:

Would it be advisable to put some
Anti seize on the inside of the pipe where the adjustable pipe enters to "prevent" any rust/sticking?

An you mention adjustable sound from higher to deeper? Which way would you adjust for higher and deeper?

About to acquire some solos and haven't found an answer after many searches.

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post #3 of 4 (permalink) Old 09-04-2012, 12:13 PM
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He's basically speaking of the drone as it's subjective, not objective. What one person deems to be acceptable another will not.

So they let you tune your exhaust to kill drone that you find unacceptable.

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post #4 of 4 (permalink) Old 09-30-2012, 08:57 AM Thread Starter
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It's not necessary to add anything on the inside of the J pipes...the clamps are high quality and will do the job. We haven't had any issues with seizing or sticking.

The adjustments cancel different frequencies of drone, but they do not affect the tone at all.

There's no set adjustment direction for them. Some cars improve by shortening it, and others by lengthening it. Each car is different, especially since each one has different mods done to it, and are all at different altitudes.
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